Gem brand welding transformers are developed by premier industries. These welding transformers are used for small and medium scale workshops. The arc welding transformers are available in 150/200/300 and 400 amp capacities. These transformers have some technical features which include: can work on single/ two/three phase input power supply;is highly versatile and can be used for all types of electrodes; are portable and the current variation easily achieved, either in moving core or switch type current selection.